Churchill sums up the problem of assessing politicians' performance

With the publication of Tony Blair's autobiography it may be worthwhile remembering a famous quote by Churchill: “History will be kind to me for I intend to write it”. But then you would be missing crusty revelations if you were not to read it; for instance: "The truth is, MPs were underpaid and expenses were used to top up income: but you can't say it". Well, with the success of this book there won't be a need to top up his income...